The invention relates to the technical field of building materials, and aims to provide a using method of a geopolymer-based self-levelling ground material. The material includes a geopolymer, an expanding agent, a redispersible latex powder, a reinforcing fiber, a defoaming agent, a water reducing agent, water and an aggregate; the geopolymer is composed of an aluminum-silicon raw material and an alkali activator. The using method includes the steps: firstly, dissolving the alkali activator in water and placing for 24 h; followed by successively adding the rest of raw material components, stirring for 2-10 min by a mortar stirrer, then casting the ground, self-levelling, molding, and curing to form the ground material. With the geopolymer as a cementitious material, the method has the advantages of less energy consumption and less environmental pollution; the formula is reasonable in design, the expanding agent and the reinforcing fiber can decrease shrinkage and cracking of the ground material, the redispersible latex powder can improve the toughness and surface smoothness of the ground material, the defoaming agent can prevent the ground material from generating a hole structure, and thus the application of the geopolymer material in the engineering construction field is developed.